18493671929520 has 40 divisors (see below), whose sum is σ = 57330382982256. Its totient is φ = 4931645847808.

The previous prime is 18493671929489. The next prime is 18493671929521. The reversal of 18493671929520 is 2592917639481.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (18493671929521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38528482947 + ... + 38528483426.

It is a 1-persistent number, because it is pandigital, but 2⋅18493671929520 = 36987343859040 is not.

Almost surely, 2^{18493671929520} is an apocalyptic number.

18493671929520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18493671929520 is an abundant number, since it is smaller than the sum of its proper divisors (38836711052736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18493671929520 is a wasteful number, since it uses less digits than its factorization.

18493671929520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77056966389 (or 77056966383 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 66.

The spelling of 18493671929520 in words is "eighteen trillion, four hundred ninety-three billion, six hundred seventy-one million, nine hundred twenty-nine thousand, five hundred twenty".